The high resistance value of these devices is such that power dissipation is always small. The rating is therefore determined by voltage considerations
only, as shown in the table above.
Thickness:
Contruction:
The thickness of these devices depend on the size of the chip.
The resistor material is screen printed onto a 96% alumina substrate and
The table below shows the standard substrate thickness used
covered with a protection comprising of a glaze followed by an organic
(mm).
coating. This construction gives an insulated device.
Terminations:
Wrap-around terminations on HR resistors have good ‘leach’ resistance
STYLE
0805
1005
1206
properties. They will withstand immersion in solder at 260°C for 30
Planar
0.4
0.63
0.5
seconds.
Wrap-around
0.4
N/A
0.5
Marking:
All relevant information is recorded on the primary package or reel.
F = Wrap-around; G = Planar Gold.
Environmental Data
Actual
Maximum
Load at rated power: 1000 hours at 70°C
Shelf life: 12 months at room temperature
Dry heat: 1000 hrs at 125°C
Temperature rapid change
Change on Wave Soldering
Voltage proof
Voltage coefficient of resistance
(10V - 25V)
∆R%
∆R%
∆R%
∆R%
∆R%
volts
%volts
0805
1005
1206
1.0
0.8
0.2
0.4
0.5
0.05
2
2
2
1
1
100
Typical
1
1
0.5
0.3
0.5
200
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
